检测一个对象是否为数组的方式有: Array.isArray() // true或false(es5) toString.call([]); // [object Array] arr.constructor; // Array() instanceof Array // true或false in ...
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编程语言 时间:
2016-05-16 10:58:06
阅读次数:
253
18: Array C Description Giving two integers and and two arrays and both with length , you should construct an array also with length which satisfied: ...
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其他好文 时间:
2016-05-16 09:23:18
阅读次数:
161
程序将打印出 : {“name”:”Eric”,”age”:23} 再看下面的例子: 程序将打印出 :["Eric",23] ...
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Web程序 时间:
2016-05-16 01:55:57
阅读次数:
172
A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its inde ...
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其他好文 时间:
2016-05-16 00:20:42
阅读次数:
176
Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target va ...
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其他好文 时间:
2016-05-16 00:12:02
阅读次数:
153
Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). Find the minimum element. ...
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其他好文 时间:
2016-05-16 00:11:40
阅读次数:
125
Binary Search基本的复杂度为O(logn)。如果提示需要对O(n)的算法进行优化,非常可能就是二分,另外二分一般出现在排序数组或者变形后的排序数组(rotated array)当中。二分主要有两种,binary search on index(index上的二分)和binary sear ...
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其他好文 时间:
2016-05-16 00:09:43
阅读次数:
166
JavaScript能做什么? 1.增强页面动态效果(如:下拉菜单、图片轮播、信息滚动等) 2.实现页面与用户之间的实时、动态交互(如:用户注册、登陆验证等) 一. 数组 var myarray=new Array(); 二. 函数 getDay() 返回星期,返回的是0-6的数字,0 表示星期天。 ...
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编程语言 时间:
2016-05-15 21:37:45
阅读次数:
284
Array C Description Giving two integers and and two arrays and both with length , you should construct an array also with length which satisfied: 1.0≤ ...
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其他好文 时间:
2016-05-15 21:27:00
阅读次数:
264
Given an array of numbers nums, in which exactly two elements appear only once and all the other elements appear exactly twice. Find the two elements ...
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其他好文 时间:
2016-05-15 21:23:56
阅读次数:
192